题干
阅读理解
This is the map of Cindy's neighborhood．Her home is on Station Road near the train station．Every day she rides her bike to school．Now Cindy is in the position(位置) of the star．
根据材料内容判断正误。
阅读理解
This is the map of Cindy's neighborhood．Her home is on Station Road near the train station．Every day she rides her bike to school．Now Cindy is in the position(位置) of the star．
根据材料内容判断正误。
为直流电源， 
为浸透饱和氯化钠溶液和酚酞试液的滤纸， 
为电镀槽，接通电路后发现 
后，使c、d两点短路．下列叙述正确的是 （ ）